柯柯亚地区具有形成致密砂岩气的条件，即有利于形成致密砂岩气藏的异常压力封隔层、良好的气源条件以及特低孔、低渗储层的广覆式分布。由于该区独特的地质条件，在3 000 m 附近发育了一套封隔层，形成了上、下2 种压力系统，且各系统内的油气地球化学特征不同。致密砂岩气藏上部为正常压力系统，具有边底水构造。下部压力系统内的气藏具有以下特点：①深部典型的自生自储式组合，具有良好的气源条件；②普遍含气，且甜点具有工业价值；③含气砂岩与甜点之间没有分隔界面，在高陡构造部位产生一定的气水分异；④气层具有异常高压，封隔层的存在有利于气藏的保存。根据致密砂岩气藏的成藏特点，对柯柯亚—鄯勒地区有利于形成致密砂岩气藏的范围进行了预测。

There are good conditions for forming tight sandstone gas in Kekeya area, Tuha Basin, including abnormal pressure sealed formation, good conditions of gas source and wide distribution of extra-lowporosity and lowpermeability reservoirs. Because of the unique geological conditions in this area, it developed a set of sealed formation at the depth of about 3 000 m, formed the upper and lower pressure system, and the geochemical characteristics of petroleum are different. The upper tight sandstone gas reservoir has normal pressure system and bottom water structure. The tight sandstone gas reservoir of the lower pressure systemhas the following characteristics: the gas source condition is good and it is typically self-generating and self-preserving; the gas is widespread in the tight sandstone and the “sweet spots” are of industrial value; there are no closed water-oil interface between gas sand and the “sweet spots” gas reservoir except for the higher tectonic position; the gas reservoir has overpressure and gas is well preserved with the sealed formation. According to the forming characteristics of tight sandstone gas reservoir, the range of the tight sandstone gas reservoir in Kekeya-Shanle area is predicted.